About Scantegrity

Scantegrity is an open source election verification technology for optical scan voting systems.
It uses privacy preserving confirmation numbers to allow each
voter to verify her vote is counted. The confirmation
numbers also allow anyone to verify that all the
votes were counted correctly.

Election officials can use Scantegrity as a standalone system or as an add-on
to provide a low-footprint audit companion solution for any current
optical scan voting system. All extra functionality is optional for voters,
staying out of the way of what voters need to do—vote.